Influence of pH and impeller tip speed on the cultivation ofBifidobacterium pseudocatenulatum G4 in a milk-based medium

Production of bacterial cellulose by a static cultivation using the waste from beer culture broth

“…The plate was then incubated at 30 o C until colonies formed on the agar plate, after which the cellulose producing (Cel + ) cells and non-cellulose producing (Cel − ) mutants were counted. Cel − mutants were detected on the plates as smoothtype colonies, while Cel + cells formed mucous and rough-type colonies, as reported previously [11,[21][22][23].…”

Biosynthesis of high molecular weight hyaluronic acid by Streptococcus zooepidemicus using oxygen vector and optimum impeller tip speed

“…For 1.047 m/s impeller tip speed, maximum cell concentration and HA biosynthesis for without and in the presence of n-dodecane were almost the same. The poor fermentation performance at higher impeller tip speed might be due to the high shear rate on bacterial cells at the tip of the impeller (26). The n-dodecane acted like a surface-active agent lowering the surface tension of the water and subsequently increasing the oxygen mass transfer (27).…”

Synthesis of Cyclodextrin-Grafted Chitosan: From Laboratory Scale to Pilot Scale

“…The constant impeller tip speed was adopted as a scale-up methodology for palm ester production up to a 75 L stirred-tank reactor by Keng et al Likewise, Imamoglu and Sukan selected the constant impeller tip speed for the stepwise scale-up process for a bioethanol production stirred-tank reactor . Additionally, the constant impeller tip speed was used for scaling up biomass production from 2 to 10 L reactor . The scaling-up of a shaken bioreactor for microbial cultures was accomplished by maintaining the constant Froude number and constant inner-to-shaking diameter ratio .…”

“…25 Additionally, the constant impeller tip speed was used for scaling up biomass production from 2 to 10 L reactor. 26 The scaling-up of a shaken bioreactor for microbial cultures was accomplished by maintaining the constant Froude number and constant inner-to-shaking diameter ratio. 27 The constant power per unit volume was successfully employed for an extractive fermented stirred-tank scale-up.…”